Sabre 43160 5-Position Power Header with Board Lock
The 75°C upper operating limit is the derating ceiling for the 18 A rating; above that, current must be reduced per the manufacturer's derating curve.
The 431604305 is the 5-position member with a board lock. Against the 431600105, which is also a 5-position through-hole header at the same 7.50 mm pitch, current, and voltage, the only difference is the board lock — the 431600105 lacks it. If your assembly sees vibration or you want the header locked to the board during rework, the 431604305 is the pick. Against the 431600106, the difference is position count: 5 positions vs 6 positions, same pitch and ratings, no board lock on the 431600106. The 431603106 is a 6-position right-angle variant with a board lock — different orientation for a board-edge harness exit.